Nine new diterpenes from the leaves of plantation-grown Cunninghamia lanceolata

Nine new diterpenes named lanceolatanol hydroperoxide (1), epilanceolatanol hydroperoxide (2), lanceolatanoic acid hydroperoxide (3), epilanceolatanoic acid hydroperoxide (4), lanceolatanol (5), lanceolatanoic acid (6), 11-acetoxylanceolatanoic acid (7), 11-acetoxylanceolatanoic acid methyl ester (8) and epoxyhinokiol (13) were characterized from the leaves of plantation-grown Cunninghamia lanceolata along with twelve known compounds. The compounds were evaluated for their growth inhibitory activities against the human prostate cell line (PC-3).

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